iTunesAPI.swift

func fetchMusic() {
        if let urlStr = "https://itunes.apple.com/search?term=宇多田光&media=music&country=JP".addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed) {
            if let url = URL(string: urlStr) {
                URLSession.shared.dataTask(with: url) { (data, response, error) in
                    if let data = data {
                        let decoder = JSONDecoder()
                        do {
                            let result = try decoder.decode(MusicOnline.self, from: data)
                            self.showOnlineFile = result.results
                        } catch {
                            print(error)
                        }
                    }
                }.resume()
            }
        }
    }